Finding the Third Proportional to 141,099.50 and 218,570

Step by Step Solution

1. Step 1: Write the proportion equation
   141,099.50 : 218,570 = 218,570 : x
2. Step 2: Convert to fraction form
   141,099.50/218,570 = 218,570/x
3. Step 3: Cross multiply
   141,099.50x = 218,570 × 218,570
4. Step 4: Simplify right side
   141,099.50x = 47,772,844,900
5. Step 5: Solve for x
   x = 47,772,844,900/141,099.50
6. Step 6: Final answer
   x = 338,575.58